In odoo 10 there is issue in displaying items when the user the user preferences is Arabic.

The steps of generating the issue:

1- Install Project module with the demo data.

2- Load  Arabic / الْعَرَبيّة language. 

3- Change user's preferences to Arabic / الْعَرَبيّة

4- Go to Tasks menu and press the calendar view. 

5- Create Task in any date. 

Observations:

1- The calendar does not display any task. 

2- After changing the user preferences to English the tasks appear normally on the calendar view. 

3- The same issue occurs in any module contains calendar like events module has the same issue.

Expectations: 

In the Arabic / الْعَرَبيّة preferences the Tasks/events should appear in the calendar view like its appearing in English preferences.

Why this issue does occur in Arabic / الْعَرَبيّة preferences? And how can be overcame?

Thanks in Advance.